APSIM sugarcane model BCR sequential extraction CiteSpace GHG emissions Mitigation of CO2-equiv Research & information: general Rhodosporidium toruloides SEM Technology: general issues acute phytotoxicity test amino acid wastes anaerobic digestion artificial neural network biochar biocharing biodegradation bioenergy resource biofuels biogas biomass combustion bioplastics calorific value characterization coconut shell coconut wastes coffee waste economic performance energy potential enzymatic hydrolysis ethanol